Initializing, please wait a moment

Kiem Tra LED

"Kiem tra LED" trong tim kiem cua hau het doc gia co nghia la mot bai kiem tra man hinh: ban nghi ngo co mot pixel chet, ket hoac doi mau tren mot laptop, dien thoai hoac man hinh ngoai va muon mot cach nhanh chong de xac nhan. Cong cu thuc su chay bai kiem tra la bai kiem tra man hinh LCD / OLED / LED trong trinh duyet tai https://freetoolonline.com/device-test-tools/lcd-test.html; no ve mau do, xanh la, xanh duong, den, trang va vang tu canh den canh de mot sub-pixel loi noi bat nhu mot cham tren mot truong dong nhat. Cung mot chu trinh mau hien thi giong nhau tren cac bang LCD, OLED va LED vi bai kiem tra la ve phan ung tung pixel, khong phai loai den nen.

Cap nhat lan cuoi: 2026-05-17

Da duoc kiem duyet boi doi ngu bien tap FreetoolOnline

Thuoc tinhGia tri
Dinh dangCong cu online, khong can cai dat
Toc doTren trinh duyet; ket qua trong vai giay
Quyen rieng tuTep o lai tren thiet bi (khong tai len)
Cong cu thuc thihttps://freetoolonline.com/device-test-tools/lcd-test.html

Bai kiem tra chinh la mot lan cham cho moi mau. Bam vao mot o mau (do, xanh la, xanh duong, den, trang hoac vang) va trinh duyet ve mau duoc chon len toan bo viewport, voi mot toggle toan man hinh tuy chon tren man hinh rong 821 pixel tro len de mau vuot qua chrome cua trinh duyet va thanh dia chi.

Reviewed by the Free Tool Online editorial team · Tested in the current versions of Chrome, Firefox, Safari, and Edge before publishing. Your file is processed in your browser and never uploaded. Report a bug - we triage within 72 hours. · Last refreshed April 2026.

Why trust these tools

  • Ten-plus years of web tooling. The freetoolonline editorial team has shipped browser-based utilities since 2015. The goal has never changed: get you to a working output fast, without an install.
  • Truly in-browser - no upload. Every file-processing tool on this site runs in your browser through modern Web APIs (File, FileReader, Canvas, Web Audio, WebGL, Web Workers). Your photo, PDF, audio, or text never leaves your device.
  • No tracking during tool use. Analytics ends at the page view. The actual input you paste, drop, or capture is never sent to any server and never written to any log.
  • Open-source core components. The processing engines underneath (libheif, libde265, pdf-lib, terser, clean-css, ffmpeg.wasm, and others) are public and audit-able. We link to each one in its tool page's footer.
  • Free, with or without ads. All tools are fully functional without sign-up. The Disable Ads button in the header is always available if you need a distraction-free run.